package com.liwc.controller;

import java.awt.image.BufferedImage;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;

@Controller
public class CaptchaImageCreateController {
	
	@Autowired
	private Producer captchaProducer;


	@RequestMapping("/captcha-image")
	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
		// Set to expire far in the past.
		response.setDateHeader("Expires", 0);
		// Set standard HTTP/1.1 no-cache headers.
		response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");
		// Set IE extended HTTP/1.1 no-cache headers (use addHeader).
		response.addHeader("Cache-Control", "post-check=0, pre-check=0");
		// Set standard HTTP/1.0 no-cache header.
		response.setHeader("Pragma", "no-cache");

		// return a jpeg
		response.setContentType("image/jpeg");

		// create the text for the image
		String capText = captchaProducer.createText();

		// store the text in the session
		request.getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);

		// create the image with the text
		BufferedImage bi = captchaProducer.createImage(capText);

		ServletOutputStream out = response.getOutputStream();

		// write the data out
		ImageIO.write(bi, "jpg", out);
		try {
			out.flush();
		} finally {
			out.close();
		}
		return null;
	}
	
	
	@RequestMapping("/toLogin")
	public String toLogin(Model model){
		
		return "login";
	}
	
	@RequestMapping(value = "/checkVerificationCode")
	@ResponseBody
	public boolean checkVerificationCode(@RequestParam("verifyCode") String verifyCode, HttpServletRequest request) {
		// 验证码的值
		String kaptchaExpected = (String) request.getSession()
				.getAttribute(com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY);
		// 用户输入的验证码的值
		String kaptchaReceived = verifyCode;
		System.out.println("实际的验证码为：" + kaptchaExpected);
		System.out.println("输入的验证码为：" + kaptchaReceived);
		if (kaptchaReceived == null || !kaptchaReceived.equalsIgnoreCase(kaptchaExpected)) {
			return false;
		}
		return true;
	}
}